Burglar-alarm.



No. 801,105. PATENTED OCT. 3, 1905. D. RBYAM.

BURGLAR ALARM.

APPLIGATION FILED NOV. 30, 1904.

ii l@ li d UNITED STATES PATENT OFFIQE.

BU RGLAR-ALARIVI.

Specification of Letters Patent.

Patented Oct. 3, 1905.

Application filed November 30, 1904. Serial No. 234,97.

To all whom it may 00711007 71..-

Be it known that 1, DAVID REYAM, a citizen of the United States,residing in Philadelphia, Pennsylvania, have invented certainImprovements in Burglar-Alarms, of which the following is aspecification.

Hy invention consists of a relatively simple and inexpensive alarm soconstructed as to be conveniently attached to a door or window and ofsuch a nature that when properly set it will cause a suitably-placedcartridge to explode when such window or door is opened.

The invention further includes a burglar or other alarm involving such acombination of parts that when it is desired to use the door or windowthe device may be so adjusted as to remain inoperative until it isdesired that it shall become operative, all as hereinafter claimed.

In the drawings herewith, Figure 1 is afront elevation of a portion of adoor and its adjacent jamb, showing my invention as applied thereto andready for use. Fig. 2 is a sectional plan View of the door and jambshown in Fig. 1 and further illustrating the construc: tion of myimproved burglar-alarm. Fig. 3 is aside elevation of the spring-arm towhich is fixed the cartridge-holder, the cartridge being shown inposition in said holder. Fig. 4c is a front elevation of a portion of awindow and of the sill adjacent thereto, illustrating my invention inposition ready for use thereon. Fig. 5 is a sectional elevation of thewindow and device shown in Fig. 4, and Fig. 6 is a modified form of myinvention.

In the above drawings, A is a portion of the door, and B a portion ofthe jamb adjacent thereto, and to this latter I fasten by any convenientmeans-as, for example, a screw-eye ca supporting structure or plate 0,which is provided with a guideway 0, in which a spring-bar D may be madeto slide longitudinally. This bar is usually of steel or springbrass,having its end d which projects beyond the door jamb curled or curved,as shown, to avoid scratching or other injury to the door A.

Fixed in any desired manner to the spring bar D is a cartridge-holder(Z, which in the relatively simple form shown in the figures preferablyconsists of a plate of thin metal having three of its edges bent orturned over so as to form a receptacle for a paper fulminate cap orcartridge of the well-known construction. This holder, while beingrigidly attached to the spring-bar D, faces toward the supporting frameor plate 0.

When it is desired'to operate the door without operating the alarm, thespring-bar D is made to slide in its guideway 0, so that its end 6 willnot be engaged by the door A. If, however, it is desired that the alarmshall operate when the door is opened, the spring-bar D is moved intothe position shown in Fig. 2, a cartridge similar in shape to that shownat 6 having been previously inserted in the holder (Z. The opening ofthe door A then bends the spring-bar D out of its normal position intothe position shown in dotted lines in the figures, until finally saidbar slides off of the edge of the door and springs back to its normalposition, thereby striking the cartridge in the holder cl violentlyagainst the plate C. Such a blow invariably explodes the cartridge, andthereby attracts attention to the fact that the door has been opened.

Applied to a window F the device may take the form shown in Figs. 4: and5, the frame or plate for supporting the spring-bar D being removably orpermanently screwed to the window-sill G, as shown. In addition Ipreferably provide a small angular piece of metal E, fastening this tothe window-sash in such manner that a portion of it extends under thespring-bar D. As in the case of the door, the opening of the windowbends the end of the spring-bar D out of its normal position, but

finally allows it to return thereto, the violence of the blow struck bysaid bar depending upon the elasticity of the material of which it ismade and the distance through which it is moved from its normalposition, in any case, however, causing the explosion of a cartridge inthe holder (Z.

If desired, the cartridge-holder cl may be permanently fastened to thesupporting structure O, as shown in Fig. 6, the cartridge being explodedwhen struck violently by the springbar D.

I claim as my invention 1. A burglar-alarm including a supportingframe,a spring-bar carried by said frame so as to be free to slidelongitudinally therein and normally projecting beyond said frame, and acartridge-holder carried by one of the said members, substantially asdescribed.

2. A burglar-alarm including a supportingframe having a guideway, a barmovable lonattached to a support, said bar having a projecting portionformed as a guideway,a springpiece slid-ably mounted in said guideway,and a cartridge-holder carried on one of the members comprised by thebar and the springpiece, substantially as described.

In testimony whereof I have signed my name to this specification in thepresence of two subscribing Witnesses.

- DAVID REYAM. Witnesses:

' ILLIAM E. BRADLEY,

Jos. H. KLEIN.

